Related Experiment Video
Updated: Oct 17, 2025

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
Published on: December 22, 2015
Complex Kernel-based spectrum reconstruction algorithm for cascaded Fabry-Perot interferometric spectrometer
Abstract:
A method to calculate the spectrum of the light incident on a cascaded Fabry-Perot interferometric spectrometer from the detector signal versus the scanning mirror position is presented. The method is based on modifying the Fabry-Perot integral equation to reduce possible spectrum reconstruction errors that arise due to inaccurate determination of the optical path difference reference position and the dependence on the dispersion of the cavity material. A transformation algorithm that employs the suggested kernel modification is derived and tested. The presented algorithm is then compared to the conventional kernel, showing spectral error reductions by larger than 20 dB.
Related Concept Videos
IR Spectrometers
Aliasing
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
Reconstruction of Signal using Interpolation
Raman Spectroscopy Instrumentation: Overview
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

